Before high-level U.S. and Chinese officials hold talks in Switzerland this weekend to discuss high tariffs, Washington and Beijing have been in a rhetorical duel over which side reached out first.

The tariff fight between the world’s two largest economies has spiraled into greater peril.

TikTok’s future in the U.S. appeared uncertain on Friday after a federal appeals court rejected a legal challenge the company brought against a law that requires it to cut ties with its China-based parent company or be banned by mid-January.